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Thread: Is it ok to use old cya from last year or the year before?

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    Join Date
    Aug 2013
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    Oklahoma City, OK
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    Is it ok to use old cya from last year or the year before?

    Does cya degrade over time If not used over a period of a year or two? I guess another way to ask is does it have a shelf life? Thanks in advance!
    20000 Gallon, Sand Filter, IG Plaster, Hayward Aqua Rite 40k SWG, TF-100 Test Kit, Taylor SpeedStir

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    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    Re: Is it ok to use old cya from last year or the year before?

    Not as long as the bottle was sealed tight.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Join Date
    Aug 2013
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    Re: Is it ok to use old cya from last year or the year before?

    Thank you for the reply Richard. I thought that was the case but wanted to make sure.
    20000 Gallon, Sand Filter, IG Plaster, Hayward Aqua Rite 40k SWG, TF-100 Test Kit, Taylor SpeedStir

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    Scuba_Steve's Avatar
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    May 2015
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    Pooler, GA
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    Re: Is it ok to use old cya from last year or the year before?

    From what I have read elsewhere on this forum, years does not describe CYA shelf life. Tens of years is more like it, possibly even longer. Ill go add my 200 year old bottle of CYA to my pool now...
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